Lock.



C. KEMP.

LOCK.

APPLlcArloN Flu-:n oT. 18, 191s.

1,390,844., Patented Apr. 15, 1919.

ZZ dl 7a r Malfa/A4 I yall/ CHARLES KEMP, 0F NEW YORK, N. Y.

LOCK.

Specification of Letters Patent. Patentgd Apr, 15, 19ML Application filed October 18, 1918. Serial No. 258,701.

the borough of Manhattan, city, county, and

State of New York, have invented certain new land useful Improvements in Locks, of l which the followingis a specification.`

My improvements relate to locks generally, but are designed more particularly for locks for doors and similar closures. The main object is to. aiord a simple butstrong and durable lock of few parts; in which all the operativeparts are protected and concealed when in locked position, and which is practically jimmyprooff-the invention consistig in the specific construction and arrangement of parts described and claimed herein, a distinctive feature being the means wherebya du lex bolting ei'ect is attained, all as hereinatter more fully set forth.

In the accompanying drawings,

Figure 1, is a top view of my improved lock, with the cover plate removed;

Fig. 2, 1s a vlew of he innerside of the cover plate;

Fig. 3, is`a section taken upon plane of line 3 3, Fig. 1; Fig. 4 is a sectiontaken upon plane of line 4-4,'Fig. 3;

Fig. 5, is an elevation of the inner side of Y the bolt rack bar;

Fig. 6, is an elevation thereof taken at ri ht angles to Fig. 5;

ig. 7, is an elevation of the open side of the hasp cylinder;

.F'g. 8, Ais an elevation of the staple piece;

Fi 9 is an end elevation of the latch spin e;

Fig. 10, is a side elevation theerof;

Figgll, is a side elevation of the latch knob or handle;

Fig. 12, is an end `view of the key arbor;

Fig. 13, is a side elevation thereof.

The casing consists of the base plate C, shell C', and cover plate C2. The shell C', and base plate C, are spaced apart in a manner well known in the art by posts c, c, on the base plate C, which latter is screwed or otherwise rigidly secured to the door or other closure to be protected. A boss c', (Fig. 3) on the shell C', is formed with a .socket c2, for the accommodation of one trunnion h, ofthe hasp cylinder H, the

other trunnion h', of said hasp cylinder H o3, in a boss c4, on the inner side of the cover plate C2.

n The hasp cylinder H, is essentially hollow 1n that ,it is formed with the longitudinal recess h2, and lateral slots h3, opening thereinto for the accommodation of the arms s, s, and cross bar s of the staple S, as will be understood by reference more particularly to Figs. 1 and 4, of the drawings.

The staple S, is protuberant from a-n angular base plate S', which is secured to and counter'sunk in the janb J, of a door frame or the'like as indicated in Figs. 1 and 4,- the lock as before intimatedbeing secured by its base plate C, to the door or other closure D, and it is secured thereto in such manner that the end Lof lthe casing in which'the hasp cylinder H, is mounted will overlap the s'taple S, and its plateS, ,when the door -or other closure is turned tol closed position. It is to be noted in this connection that edge c", of the base plate C, at this end of the teeth b, formed for the purpose on the adjacent outer end b', of the bolt bar B, the rear portion of which is formed with two seriesy of rack teeth, one series b2, for engagement with peripheral teeth Z, on the annular rollback or boss l', of the latch spindle L,' and the other series b3, for engagement with the peripheral teeth la, on the annular disk k', of the key arbor K.

The forward 'end of the rack bolt bar B is held againsty lateral movement by vguards c5, c5, (Figs. 1 and 3) on the base plate C, while the rear portion of said bolt rack bar is held against lateral movement on one side by the guard c, also on the base plate C, and by its contact on the other side with the ,aforesaid annular rollback or boss Z', of the latch spindle L, and, with the disk k', of the key arbor K, as will be understood by reference more particularly to Fig. 3.

The key arbor K, and the latch spindle L, are positioned in axial a1inement,-but are not connected with each other, the latch spindle L, being journaled on the shell plate C', while the key arbor K, is journaled on the base plate C, as shown more particularly in Fig. 4,-theannular disk c, of the key arbor resting against the annular rollback or boss Z, of the latch spindle L. Z2, is the handle of the latch spindle L, formed with the angular stem Z3, fitting in a correspondingly formed socket Z4, in the latch spindle L, and secured thereto. Thus by means of this knob or handle Z2, the latch spindle may be turned to reciprocate the rack bolt B. The key arbor in like manner `is turned by means of a suitable key'inserted in the key hole 7c", of the arbor K, it being understood that said arbor, represents symbolically anyv of the key arbors or equivalent devices known in the art.

In order to hold the latch spindle L, in prescribed position with its teeth Z, either in or out of engagement with the teeth b2', of the rack bolt B, I form said latch spindle L, with a duplex cam Z5, and provide aiXed flat spring m, the free end of which bears against said duplex cam Z5, with sufficient pressure to normally hold the latch spindle either in the position shown in Fig. 2, or in an inter'- mediate position in which the latch spindle is turned to bring one of the apices of the cam into contactual engagement with said sprin m,-the latter yielding before the protu erant cam surfaces. In other words it is obvious that if the latch spindle L, is

. turned to bring the duplex cam Z5, at substantially right angles to that shown in Fig. 2, the spring m, at dead center will tend to hold the latch spindle in such position.

As before intimated, although the latch spindle and the key arbor are in axial alinement they are independently rotatable upon. their aXes. Hence either may be used to reciprocate the rack bolt B, to make or break connection between the has cylinder H, and thc bolt B, and the staple ,-the spur teeth Z, on the latch spindle L, being out of coinci dence with the spur teeth lo, on the key arbor. A ratchet spring r, may be provided for engagement with the peripheral teeth Zt, of the hasp cylinder H, of sufficient elasticity to ad` mit of the turning of said cylinder by thel rack bolt while tending constantly to steady and hold said cylinder against play or looseness.

As will be understood 'by reference to Figs. l and 4, particularly that when the rack bolt B, is shot to locking position the action of the hasp cylinder in engaging the cross bar s", of the staple is supplemented and reinforced by the outer end of the said bolt itself which also enters the staple, thus effecting a dual locking of the parts that eiectually prevents the forcing or jimmying of the lock by ordinary known means short of the actual destruction of the lock or the door or other closure sought to be protected. Furthermore all the operative parts of the locking mechanism are inclosed and isolated when connection is made, with the staple; and the partsy are simple, inexpensive and not liable to derangement under ordinary conditions of use.

What I claim as my invention and desire to secure by Letters Patent is,

l.v In closure means of the character desig nated, in combination with a jamb staple or equivalent stationar securing means, a lock comprising a rotata le hasp cylinder adapted to engage with said staple and formed with peripheral teeth, a rack bolt formed with teeth engaging said cylinder teeth, and with two other series of rack teeth, one4 set engaging and actuated by teeth on a key arbor, and the other set engaging` and actuated by teeth on a latch spindle, together with said toothed key arbor and said toothed latch spindle, for the purpose set forth.

2. In closure means of the character designated, in combination with a jamb staple or equivalent stationary securing means, a lock comprising a rotatable hasp cylinder adapted to engage with said staple and formed with peripheral teeth, a rack bolt adaptedto engage with said staple and formed with teeth engaging said cylinder teeth, and also formed with two other series of rack teeth,

one set engaging and actuated by teeth on a key arbor, and the other set engaging and actuated by teeth on a latch spindle, together with said toothed key arbor and said toothed latch spindle, for the purpose set forth.

3. In closure means of the character designated, in combination with a jamb staple or equivalent stationary securing means, a rack bolt adapted to engage with said staple and formed with two series of rack teeth, one set I I of said rack bolt teeth engaging and actuated by teeth on a latch spindle, the other set of said rack bolt teeth engaging with and actuated by teeth on a key arbor, said key arbor formed with a cam, a dead center spring detent contactually engaging said cam, and said latch spindle, for the purpose described. l

GHARLES KEMP. Witnesses:

GEO. WM. MIA'rr,

JOSEPH LEWIS. 

